Overview
- Startup of Battery 14 is expected to begin Thursday afternoon following final safety and equipment evaluations.
- U.S. Steel says emissions controls will be active and closely monitored, and it has notified the Allegheny County Health Department.
- Preliminary findings point to pressure buildup in a gas isolation valve during maintenance as the cause of the Aug. 11 explosion, with the investigation continuing.
- The company reports strengthened safety procedures, including a prohibition on using high‑pressure water to clean valves.
- The August incident killed workers Timothy Quinn, 39, and Steven Menefee, 52, and injured others, and the company has not provided a new update on Battery 13.